The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines.
In April 2004 edition 1.1 of the data set was transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated Edition 20040422.
Edition 1.1 had one minor update from previous edition (ver. 1.0). A polygon was deleted. See process steps.
Links to these are provided in the Cross References section.
Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, email@example.com. License fees and a license agreement may be required, depending on the proposed usage.
Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.
The data do not replace the need for detailed site-specific studies.
The features were imported into the ISGS SDE enterprise database following steps outlined in ISGS procedure GISDB_0009.
QAT-GEO - Defines the name of the geologic unit and indicates whether or not the unit is a moraine. The first four digits indicate unit name, as shown in the table below. The first four digits are identical to the item QUAT. The final digit is the moraine qualifier and is identical to the item QUAL.
UNIT - Name of the geologic unit. See table below.
QUAT - Number indicating name of the geologic unit. See table below.
SYMBOL - Map symbol from the published map, corresponding to name and number of unit. See table below.
QUAL - Indicates whether or not unit is a moraine 0 - not a moraine 1 - unit is a moraine 9 - water
ABUNIT - Abbreviated unit name. This is the same as the first ten characters of UNIT.
QUAT SYMBOL UNIT 50 c cahokia alluvium (includes alluvial fan facies) 60 gl grayslake peat 70 pl parkland sand 90 py peyton colluvium 110 Imr ravinia sand member 149 pr peoria loess and roxana silt (includes peyton colluvium) 240 ec carmi member 250 ed dolton member 260 hm mackinaw member 270 hb batavia member 280 hw wasco member 410 ww wadsworth till member 420 wh haeger till member 430 wy yorkville till member 440 wm malden till member 450 ws snider till member 471 wt-a tiskilwa ablation drift 472 wt tiskilwa till 480 wb batestown till member 490 wp piatt till member 500 wd delavan till member 510 wf fairgrange till member 520 wlc lee center till member 530 we esmond till member 535 tr unnamed till member 660 wic capron till member 720 wia argyle till member 810 t teneriffe silt 820 pe pearl formation 830 gr radnor till member 840 gs sterling till member 860 gw winslow till member 870 gha hagarstown member 900 gh hulick till member 910 go ogle till member 920 gv vandalia till member 970 gk kellerville till member 1021 b banner formation till 1022 b-o banner formation outwash facies 1180 mg mounds gravel 9991 surface-mined area 9998 water 9999 not a quaternary deposit
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Illinois Natural Resources Geospatial Data ClearinghouseGenerated by mp version 2.8.25 on Thu Apr 02 09:54:10 2009